2021-03-19 10:32:22,915 INFO o.a.j.s.FileServer: Set new base='.'
2021-03-19 10:32:22,920 INFO o.a.j.e.RemoteJMeterEngineImpl: Cleaning previously set properties: {includecontroller.prefix=/data/jmeter-tests/test/setA/}
2021-03-19 10:32:22,920 INFO o.a.j.e.StandardJMeterEngine: Applying properties {includecontroller.prefix=/data/jmeter-tests/test/setA/}
2021-03-19 10:32:22,920 INFO o.a.j.e.RemoteJMeterEngineImpl: Running test
2021-03-19 10:32:22,921 INFO o.a.j.e.StandardJMeterEngine: Running the test!
2021-03-19 10:32:22,921 INFO o.a.j.s.SampleEvent: List of sample_variables: []
2021-03-19 10:32:23,042 INFO o.a.j.e.StandardJMeterEngine: Starting ThreadGroup: 1 : Thread Group
2021-03-19 10:32:23,042 INFO o.a.j.e.StandardJMeterEngine: Starting 1 threads for group Thread Group.
2021-03-19 10:32:23,042 INFO o.a.j.e.StandardJMeterEngine: Thread will continue on error
2021-03-19 10:32:23,042 INFO o.a.j.t.ThreadGroup: Starting thread group... number=1 threads=1 ramp-up=1 delayedStart=false
2021-03-19 10:32:23,042 INFO o.a.j.c.IncludeController: loadIncludedElements -- try to load included module: /data/jmeter-tests/src/sew/a.jmx
2021-03-19 10:32:23,042 INFO o.a.j.s.SaveService: Loading file: /data/jmeter-tests/src/sew/a.jmx
2021-03-19 10:32:23,042 ERROR o.a.j.u.JMeterUtils: File "/data/jmeter-tests/src/sew/a.jmx" not found for Include Controller "Include A" - see log for details
The folder /data/jmeter-tests/src/sew is set in jmeter.properties on the server.
I'm using JMeter 5.4.1 and I can share the test codes and scripts if required. This is how I am using the controller.